<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <script>
        var obj1 = {
            name: 'zs',
            getName: function () {
                return this.name;
            }
        }

        var obj2 = {
            name: 'ls'
        }

        console.log(obj1.getName()); // zs
        console.log(obj1.getName.call(obj2)); //ls
    </script>
</body>

</html>